Morphologic study of mandibular outer cortex osteotomy.

Abstract:

BACKGROUND:The purpose of this study was to illustrate the morphologic changes of the mandible after outer cortex osteotomy. METHODS:Ten patients had undergone mandibular outer cortex osteotomy. By using the true-up and dissection techniques based on three-dimensional spiral computed tomography, variables of effect and bone regeneration were evaluated 6 months postoperatively. RESULTS:Concavity could be seen in the area from which the mandibular outer cortex had been removed 6 months postoperatively, especially at the external oblique line region. The average cup depth was 3.64 +/- 1.67 mm postoperatively. Diminution of bone volume was 1.7 +/- 0.5 percent for the entire mandible and 55 +/- 9 percent for the local area 6 months postoperatively. Bone regeneration could be seen in the area from which the mandibular outer cortex had been removed. Compared with immediately postoperatively, the ratio of neoformative bone was 84.6 +/- 7.3 percent 6 months postoperatively. The main region of bone regeneration was the mandibular angle. CONCLUSIONS:Mandibular outer cortex osteotomy is an effective technique for reducing the width of the lower face. Masseter muscular movement should be restricted postoperatively to prevent hyperostosis at the angle area.

journal_name

Plast Reconstr Surg

authors

Zhao YF,Liu XJ,Hao YF,Lu P,Gui L

doi

10.1097/PRS.0b013e3181845951

subject

Has Abstract

pub_date

2008-10-01 00:00:00

pages

1154-1161

issue

4

eissn

0032-1052

issn

1529-4242

pii

00006534-200810000-00021

journal_volume

122

pub_type

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